MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
T-4 cell
A type of T cell that has CD4 markers on its surface and participates in the immune response by recognizing foreign antigens and secreting substances called cytokines that activate T and B cells. T-helper cells fall into two main classes…
Read the definitionRandom terms
Show more- Adverse effect A harmful or abnormal result. An adverse effect may be caused by administration of a medication or by…
- Chromosome, X See: Chronic myelogenous leukemia.
- Petit mal A form of epilepsy with very brief, unannounced lapses in consciousness. A petit mal seizure involves a brief…
- ATM Symbol for the ataxia telangiectasia mutated (ATM) gene. The protein made by the ATM gene functions to…
- Influenza, avian Influenza, avian: Also called fowl plague, avian flu, and bird flu. A highly contagious viral disease with up…
- Odynophagia Pain on swallowing food and fluids, a symptom often due to disease of the esophagus. From the Greek roots…
- Cysteine An amino acid, one of the 20 building blocks of protein. Cysteine can be synthesized by the body and is not…
- Beau lines See: Beau's lines
- Glossal Of or pertaining to the tongue. Glossal is used as both an adjective and a compound word, as in hypoglossal…
- Gland of external secretion See: Exocrine gland
- Ganglia, basal A region located at the base of the brain composed of 4 clusters of neurons, or nerve cells. This area of the…
- Atrioventricular node The atrioventricular (AV) node is an electrical relay station between the atria (the upper) and the…